#include<stdio.h>
#include<string.h>
int main()
{
  FILE *fp = fopen("myfile","r");
  if(!fp)
  {
    printf("fopen error!\n");
    return 1;
  }
  char buf[1024];
  while(1)
  {
    size_t s = fread(buf,1,5,fp);
    if(s>0)
    {
      printf("%s1111",buf);
    }
    if(feof(fp))
    {
      break;
    }
  }
  fclose(fp);
  return 0;
}
